Automatic car-ventilator



(N0 Model.) v

G. H. MAYNA RD. I AUTOMATIG GA R VENTILATOR.

iTo. 543,581, Patented July so, 1895.

II III III UNITED STATES PATENT FFICE.

GEORGE H. MAYNARD, OF BOSTON, MASSACHUSETTS.

AUTOMA TIC CAR-VENTILATOR.

SPECIFICATION forming pa.rt of Letters Patent N0. 543,581, dated July30, 1895.

Application filed. J'u1y 12.1894.

T0 all whom 525 m0ay eoncern:

Be 1't known that I, GEORGE H. MAYNARD, of Boston, in the county ofSuffolk and Sta.te of Massaehusetts, ha.Ve invented certain new andnseful Improwaments in Automatic Car- Ventilators, of whieh thefollowing is a specificati0n.

This invention relates to an iniprovement Tin automatie ventilators forcars, a.nd has for its objeet to provide a. ventilator for cars that isautomatic in its aetion and arranged to be operated by currents of airpassing through a portion thereof.

My invention consists in eertain novel features of construction andarrangement of parts Whieh wi1lbe fully hereinafter described andparticularly pointed out in the claim.

Reference is 130 be had to the aecompanying drawings and the charactersmarked thereon, which forma a part of this speoification, likecharacters design'ating 1ike parts 01 fea.tures, as the ca.se may be,wherever they oecur.

In the dmwings, Figure 1 is afront view of my ventilator. Fig. 2 is a.seetion thereof on the 1ine 2 2 of Fig. l. Fig. 3 is a.perspeetive view.Fig. 4: is a view of a. prtion of the pipe, showing my improved form ofvalve in position. I5ig. 5 is a detail view of a. dastguard.- Fig. 6represents an opening in a pipe in whieh my improved valve is mounted.Fig. 7 is a detail view of my improved valve.

a represents a. pipe or tube of suita.ble dimensions arranged to bepla.ced underneath the cm. In o ne side of said tube is a triangularopenin g a, over whieh a pipe b is soldered or seeured in any well-knownway. The pipe b has conneet e to i'm another pipe c, designed to bep1a.ced in the fioor of the 02.1, in communication with the interionofthe ear. In the triangular opening 0:?I mount my improVed form of va1ved, whieh is arranged 130 be mounted eccentrically, and is formed withintegral projections d f0r said eccentrie support formed on the valvea.t one side from its Seria1 N0. 517.287. (N0 n1odel.)

Mounted in the pipe bis a dust-guard f, consisting of an automatic valvee opening toward the pipe a.

The parts being constructed and arranged aS deseribed and the ventilatormounted upon tion in which the eurrent of air is going and Will throwthe shorterpart 0f said valve in an Opposite direction against one ofthe sides a. (See Fig. 2.) The rush of the air through the pipe byelosing the va1ve d upon one side through the pipe b, openit1g the valvee, said air uniting With the main current a.nd passing out of the. pipeab the end x (Fig. 2) in the direetion of the arrow marked 3. rent ofair so sei; up will coninue whi1e the car is in motion; a.nd inasmuch asthe pipe c is in communication with the interior of the ca.r a.t itslower part the fou1 air which 001- lects ab the 1ower part of a room 01'car will be drawn from the car a.nd a perfect venti1ation insured.

When the ear moves in thedirection oppo site to the direction assumedthe ventilator Will work a.nd the air Will be dra.wn frorn the car, onlythe position 0f the valve d and of the eurrents of air will be thereverse of what is shown in Fig. 2.

The guard f serves o0 prevent dusf, cinders, &0., being forced into thecar by sudden stopping of the car or by gusts of Wind. blowing in thedirection opposite to the direetion of the air-eurrent through the pipea.

By means of the triangular opening in the pipe and the peculiarformafc-ion of my valve I am enabled 110 make a ventilator in which theshorter portion of the valve, by striki1ig against the side 0f thetria.ngular opening, forms a. complete closure at tha.t point. At thesame time, by its eonstruction, I am enabled The eurwill cause a suetionof air down the pipe c 1:0 greatly cheapen the cost of manufa.eture. y

cient form of ventilator, one that is automatic in its aetion andcerta.in in its operation, regardless of the direction in which the caris moving and one that requires 110 attention with regard to theadjustment of its parts.

Having tl1us explained the natura 0f my invention am]. described a way0f constructing and using the sarne, though Without attempting to sei;forth all of the forms in which it may be made or all of the modes ofits use, what I claim, and desire to secure by Letters Patent, is-- Anautomatic ve ntilator for cars, comprising in its construction a pipe asecured 10 the car in the direction 0f the length 0f the lat-

